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PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS
 9 Months Ended
Sep. 25, 2021
Retirement Benefits [Abstract]  
PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS
The following table provides the components of net periodic cost for the Company’s pension, deferred compensation and executive supplemental life insurance retirement plans:
 Three Months EndedNine Months Ended
September 25, 2021September 26, 2020September 25, 2021September 26, 2020
(in thousands)
Service cost$911 $797 $2,733 $2,392 
Interest cost1,344 2,355 4,032 7,064 
Expected return on plan assets(1,983)(2,981)(5,950)(8,944)
Amortization of prior service cost (credit)(128)(125)(383)(376)
Amortization of net loss1,110 1,586 3,330 4,758 
Other adjustments— 125 (572)375 
Net periodic cost$1,254 $1,757 $3,190 $5,269 
Service cost is recorded as an operating expense within the accompanying unaudited condensed consolidated statements of income. All other components of net periodic costs are recorded in Other expense, net in the accompanying unaudited condensed consolidated statements of income.
The net periodic cost for the Company’s other post-retirement benefit plan for the three and nine months ended September 25, 2021 and September 26, 2020 was not significant.